New Zealand Legislation: Regulations
Regulations are laws made under Acts
Schedule 1 |
In the following table,—
1-hour mean—
(a) means a mean calculated every hour on the hour for the preceding hour; and
(b) in relation to a contaminant at a particular location for a particular hour, means the mean of not more than 10-minute means, collected not less than once every 10 seconds, for the contaminant at that location during that hour
24-hour mean—
(a) means a mean calculated every 24 hours at midnight for the preceding 24 hours; and
(b) in relation to a contaminant at a particular location for a particular 24-hour period, means—
(i) the mean level at which the contaminant is recorded in the air, by continuous sampling of the air at that location, throughout that 24-hour period; or
(ii) the mean of the 1-hour means for that contaminant at that location for the preceding 24 hours
running 8-hour mean—
(a) means a mean calculated every hour on the hour for that hour and the preceding 7 hours to give 1 running 8-hour mean per hour; and
(b) in relation to a contaminant at a particular location for a particular hour, means the mean of the 1-hour means for that contaminant at that location for that hour and the preceding 7 hours.
| Contaminant | Threshold concentration | Permissible excess | ||
|---|---|---|---|---|
| Carbon monoxide | 10 milligrams per cubic metre expressed as a running 8-hour mean | One 8-hour period in a 12-month period | ||
| Nitrogen dioxide | 200 micrograms per cubic metre expressed as a 1-hour mean | 9 hours in a 12-month period | ||
| Ozone | 150 micrograms per cubic metre expressed as a 1-hour mean | Not to be exceeded at any time | ||
| PM10 | 50 micrograms per cubic metre expressed as a 24-hour mean | One 24-hour period in a 12-month period | ||
| Sulphur dioxide | 350 micrograms per cubic metre expressed as a 1-hour mean | 9 hours in a 12-month period | ||
| 570 micrograms per cubic metre expressed as a 1-hour mean | Not to be exceeded at any time |